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/*
* Copyright 2016-2025 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* https://www.openssl.org/source/license.html
* or in the file LICENSE in the source distribution.
*/
#include <openssl/x509.h>
#include <openssl/ocsp.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/rand.h>
#include "fuzzer.h"
int FuzzerInitialize(int *argc, char ***argv)
{
FuzzerSetRand();
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS
| OPENSSL_INIT_ADD_ALL_CIPHERS | OPENSSL_INIT_ADD_ALL_DIGESTS, NULL);
ERR_clear_error();
CRYPTO_free_ex_index(0, -1);
return 1;
}
static int cb(int ok, X509_STORE_CTX *ctx)
{
return 1;
}
int FuzzerTestOneInput(const uint8_t *buf, size_t len)
{
const unsigned char *p = buf;
size_t orig_len = len;
unsigned char *der = NULL;
BIO *bio = NULL;
X509 *x509_1 = NULL, *x509_2 = NULL;
X509_STORE *store = NULL;
X509_VERIFY_PARAM *param = NULL;
X509_STORE_CTX *ctx = NULL;
X509_CRL *crl = NULL;
STACK_OF(X509_CRL) *crls = NULL;
STACK_OF(X509) *certs = NULL;
OCSP_RESPONSE *resp = NULL;
OCSP_BASICRESP *bs = NULL;
OCSP_CERTID *id = NULL;
x509_1 = d2i_X509(NULL, &p, len);
if (x509_1 == NULL)
goto err;
bio = BIO_new(BIO_s_null());
if (bio == NULL)
goto err;
/* This will load and print the public key as well as extensions */
X509_print(bio, x509_1);
BIO_free(bio);
X509_issuer_and_serial_hash(x509_1);
i2d_X509(x509_1, &der);
OPENSSL_free(der);
len = orig_len - (p - buf);
x509_2 = d2i_X509(NULL, &p, len);
if (x509_2 == NULL)
goto err;
len = orig_len - (p - buf);
crl = d2i_X509_CRL(NULL, &p, len);
if (crl == NULL)
goto err;
len = orig_len - (p - buf);
resp = d2i_OCSP_RESPONSE(NULL, &p, len);
store = X509_STORE_new();
if (store == NULL)
goto err;
X509_STORE_add_cert(store, x509_2);
param = X509_VERIFY_PARAM_new();
if (param == NULL)
goto err;
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_NO_CHECK_TIME);
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_X509_STRICT);
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_PARTIAL_CHAIN);
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
X509_STORE_set1_param(store, param);
X509_STORE_set_verify_cb(store, cb);
ctx = X509_STORE_CTX_new();
if (ctx == NULL)
goto err;
X509_STORE_CTX_init(ctx, store, x509_1, NULL);
if (crl != NULL) {
crls = sk_X509_CRL_new_null();
if (crls == NULL)
goto err;
sk_X509_CRL_push(crls, crl);
X509_STORE_CTX_set0_crls(ctx, crls);
}
X509_verify_cert(ctx);
if (resp != NULL)
bs = OCSP_response_get1_basic(resp);
if (bs != NULL) {
int status, reason;
ASN1_GENERALIZEDTIME *revtime, *thisupd, *nextupd;
certs = sk_X509_new_null();
if (certs == NULL)
goto err;
sk_X509_push(certs, x509_1);
sk_X509_push(certs, x509_2);
OCSP_basic_verify(bs, certs, store, OCSP_PARTIAL_CHAIN);
id = OCSP_cert_to_id(NULL, x509_1, x509_2);
if (id == NULL)
goto err;
OCSP_resp_find_status(bs, id, &status, &reason, &revtime, &thisupd,
&nextupd);
}
err:
X509_STORE_CTX_free(ctx);
X509_VERIFY_PARAM_free(param);
X509_STORE_free(store);
X509_free(x509_1);
X509_free(x509_2);
X509_CRL_free(crl);
OCSP_CERTID_free(id);
OCSP_BASICRESP_free(bs);
OCSP_RESPONSE_free(resp);
sk_X509_CRL_free(crls);
sk_X509_free(certs);
ERR_clear_error();
return 0;
}
void FuzzerCleanup(void)
{
FuzzerClearRand();
}
|
